Why can't I sing F3?

So I can hit from G2-E3 and then from G3-G4 but for some reason I just cant hit F3, how am I able to sing both higher and lower than this but just not

So I can hit from G2-E3 and then from G3-G4 but for some reason I just can't hit F3, how am I able to sing both higher and lower than this but just not this one note?

or:So I can hit from G2-E3 and then from G3-G4 but for some reason I just can't hit F3, how am I able to sing both higher and lower than this but just not this one note?

Tags:sing,