Aggressive discussion

I’m a MA student in an area of philosophy where there’re less women. I have a somewhat aggressive personality so I don’t find it too bothersome when I find myself in what might have been sexist situations. However, I sometimes observe other girls who are less aggressive than I am and it makes me sad watching them struggle to get their voice out over all the male students.
I was taking a UG/MA combined seminar course where the gender ratio is just slightly above 1:10. The professor is a male who is very conscious of gender issues and tries his best to be sensitive and fair. There are a few male students in the classroom who are fairly aggressive in general – they constantly cut each other off and always speak very loudly. I have interacted with them outside of class and, from what I can gather, they are not really sexists: they do hear my points and get into meaningful discussions with me. It’s probably just their personalities to be loud and have short attention spans.
What is unfortunate is the fact that these guys can be quite intimidating (without actually trying to intimidate) – they are bigger physically, louder, and appear to be more confident (irrespective of how well they understand the course material). Aside from myself, there is only one other girl who comes to classes every week. She is a quiet Asian girl who speaks very softly. Sometimes she would be making a very good point but the guys just started talking and no body could hear her. The prof is too polite to silence them and, even if he does manage to shush them, the girl would either be too intimidated to resume or thought she was making a stupid point – which she totally wasn’t. After a couple of times she just stopped speaking. Even if the prof asks her opinion (I suspect because he has noticed this) she would just say very little. I don’t think it’s fair to put all the blame on those guys, because it was supposed to be a free discussion, and people did cut each other off rather frequently. I’ve always wondered how anyone could’ve done anything to change the situation. It just feels to me that nobody is really at fault here (except maybe the guys can be a bit more respectful, but let’s face it, philosophical discussions can get quite intense).