As an avid buyer of Florida domains (usually off drop), I completely ignore FLA as much as I ignore JAX as an abbreviation for Jacksonville.
"Florida Taxis" only gets 140 monthly/global. Convert "Florida" into a non-standard, imaginary abbreviation and the domain itself isn't desirable. If you have faith in these keywords, you're better off registering "FloridaTaxis.net"- which is available- and deving that over FlaTaxis.com.