IMO hes either drawing to the nuts or flopped a set/two pair. I can see 98s, 85s, 54s, 67 making this play and they certainly seem to fit into his range.

I think you can call here and not loose to much value. AK will likely lead a smaller turn bet and a FD will prob bet harder if missed. Id suspect a set to either value-town (3/4ish) or make it look like a bluff.

I don't think his VP$IP is worthless even if it is over 11. He's clearly a player that likes to get involved (wider range).