When someone who has your same privilege (male privilege in this case) and they are using that, intentionally or otherwise, to derail a conversation or attack another person, you absolutely should call them out if you feel safe about doing so.

You certainly can call out oppressive behavior from others that don't share your privilege or background, but a lot of times that behavior isn't standing against oppressive BS, but rather reinforcing it. In this very discussion, there any several posters who are disregarding the OPs experience so that their opinions about sexism and male dominance in the classroom aren't challenged.

The fact of the matter is this classroom was an audience of (mostly) women who had selected an environment that would have almost none or no men attending. We can't simply blame that audience and teacher for not standing up to an aggressive male when the whole point of this kind of class to leave those people out in the first place. I also don't blame the OP for not speaking out, but it's important to note once you learn that this kind of behavior is wrong, you can call someone out on it if you feel you are safe to do so.