ProPokerTools Hold'em Simulation
1,716 trials (Exhaustive)
board: 9

8

3

7
KhJh
27.07% (460 wins, 9 ties)
99, 88, 33, AA, KK, QQ, JJ, TT, 98s, AhQh, AhTh, 7h6h
72.93% (1,247 wins, 9 ties)
This should be pretty accurate.
You only need $10 in implieds (12.75 / 38.25 + 10 = 26.4% equity needed).
Seems a clear call to me.
I'd often raise the flop FWIW, but against an unknown it might not be too sensible since you don't know if he tends to cbet such boards as a bluff.