There will be no frame number; bike is way too early for that. It has the crossbar up in front of the front down tubes, which ended with the introduction of the 1948, if I'm not mistaken.
It also has the tall air cleaner, which changed to a much shorter one in 1947.
Judging from the engine number, H7655, I'd say it is likely a 1946.
Hey Ernie, what do you think? LOL