Another question is whether he has shown down after 3-betting before, and if so, what he had.

And wrt image, has he given any indication that he has one of you and/or anyone else? Quite a few players at this level don't, so factoring image into your decision-making isn't always a good thing to do.

Also, even with seemingly attractive pot odds, if he has you beat, how many outs are you likely to have? With only one pull left, if you're trying to catch a 2- or 3-outer, calling doesn't look so good.