i don't think the BB plays QQ-AA this way. I'd also expect TT or JJ to reraising/pushing a good percentage the the time preflop. Huge overbet, it's either two small pairs, a draw + pair (66, 88, 46, 56, 67, 78), or just a single pair of 7s. I don't think he raises all-in w/ anything better than two pair.

I would really hope I had a read. Honestly, I've only invested 600 chips, so I would probably chicken out and fold. But I think it's probably a call, given the semibluffing possibilities and range I defined.