The guy was actually quite aggressive, and had made quite a few moves earlier. After my time with him, his preflop aggression and his unusual flop call, my intuition told me that he was raising behind me. The thing that also went through my head was that there was a possibility of him having AK too.

But now when I think about it, of course it's not at all obvious that he'll raise, and after reading your responses I'm now convinced that a call is correct, it was just me being weak, folding.