Good vs. short stack?

PF is pretty gross b/c I called that raise from a short stack, I'm aware of that. Villian is 16/5. Is the flop c/r standard?

Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP3 ($27.45)
CO ($48.90)
Button ($25.55)
SB ($43.75)
BB ($81.20)
UTG ($21.13)
UTG+1 ($19.99)
Hero ($47.25)
MP2 ($14.20)

Preflop: Hero is MP1 with 7, 5. SB posts a blind of $0.25.
2 folds, Hero calls $0.50, MP2 raises to $2, 5 folds, Hero calls $1.50.

Flop: ($4.75) 6, 5, A (2 players)
Hero checks, MP2 bets $3, Hero raises to $35,

He might fold an under-pair, sure.

I was thinking I was 50/50 with a reasonable range that calls me, and there are at least a few hands that he'll fold, making this +EV. Is my reasoning sound?

Sure, whatever. He's a short-buy, you hit the flop, let's gamble.