Villain is a random. No reads.

I know that these huge raises from randoms are almost never bluffs. But here I just felt that the range he is representing is just so tiny. I tanked for a long time. Basically I felt that hands like flopped sets would have raised earlier and that there are only very little 7s in his range at this point. Only Ah7h and 8h7h really made sense for value here. But at the same time it's hard to put him on a bluff here. If he wanted to bluff the river with a busted FD, he can't really c/r since I could just check behind. In the end I leveled myself into a call, just because I felt he represented too narrow a range.