flush

I want you to give me your opinions about this hand. I played this hand on NLH cash game 25-50 peso (1-2 USD) 9max in Mexico. At this time, I had KJo (I didn't have ❤️ in this card.

Jh4h7c9h9d
here BB effective stack 16000 peso
Lg effective stack 10000 peso
preflop
Lg raise 150 peso
BB call

Flop 325 peso
J❤️4❤️7♣️
Lg bet 500 peso
BB call

Turn 1325peso
9❤️
Lg bet 500 peso
BB call

River 2325 peso
9♦️
Lg bet 2000 peso
BB ??

Should I call on this spot? I didn't have ❤️ in my card. But I saw that Lg player bluffed with certain frequency and I thought that he would bluff at this spot with air hands. Should I think that Lg player have 9?