NL50 SH river straight on paired board vs river overbet

[castor11]

$0.25/$0.50 No Limit Holdem
5 Players
Hand Conversion Powered by weaktight.com (http://weaktight.com/)

Stacks:
UTG ($57.15)
CO ($59.17)
hero (BTN) ($49)
SB ($53.35)
BB ($55.97)

Pre-Flop: ($0.75, 5 players) hero is BTN :6s: :7s:
2 folds, hero raises to $1.25, SB raises to $3.75, BB calls $3.25, hero calls $2.50

Flop: :4s: :9s: :4d: ($11.25, 3 players)
SB checks, BB checks, hero checks

Turn: :5h: ($11.25, 3 players)
SB checks, BB bets $4.50, hero calls $4.50, SB folds

River: :3c: ($20.25, 2 players)
BB bets $30, $30 to hero ($40.75)?

Call/fold/ai?

[want2push]

I never like to call an overbet, but I'm afraid I can't fold my hand here. Your hand is so much under reped.

[castor11]

I called. He had AA.

[The teoszan]

Hes bet was scary a bit but I would never fold this against a player like him.The sample size is small but i suppose that he is not a good player.The only card which I`m afraid of is the 99 he could 3 bet us with worse but I would call.Anyway hes check OTF with his over was interesting

[castor11]

Hes bet was scary a bit but I would never fold this against a player like him.The sample size is small but i suppose that he is not a good player.The only card which I`m afraid of is the 99 he could 3 bet us with worse but I would call.Anyway hes check OTF with his over was interesting

ty your answer:)