I'm going to try that tomorrow night when the odor away has fully dried.One more remedy: newspaper, crushed. You can stick it directly in the bag or, if you worry about ink transfer, inside a cloth of some kind. The newspaper absorbs odors. Close up the bag (or leave it open, I think it works either way) and let it sit for a while.
Want to point out that vintage LV Monogram has a particular odor that develops in the canvas itself, not so much the interior cotton lining. It isn't offensive once you recognize and accept that. I wonder if you're smelling that? Hard to describe, but: a sweet, tobacco-ish scent that comes just from the normal aging process of LV Mono canvas. If that is possibly it, it goes with vintage, and it won't change.