Link to hand

Guy is 21/21 after 42 hands. So significiant stats here. Maybe we can count 33% CBet stat, but 3 hands doesn't make this that important.. I know, that we can make case for 3betting here, but I think calling is fine. Flop and turn are fairly standard. But what to do on the river? According to PT4 I need him to be bluffing 37% of the time. He might be doing that with missed flushdraws, but I don't see many people in this stakes doing this kind of overbet. But on the other hand, would he be doing that with the nut part of his range? He would just scare off some of the hands, that otherwise would call. So should I be calling here? I think raising is out of a question here.

I appreciate any comment