In general, this is not done...for several reasons.
One is that aggressive fish tend to eat a lot of the things you put in a coral tank.
Another is taht aggressive fish tend to eat a lot and produce a lot of waste, impacting water quality. Corals need VERY good water quality which is why the bioload (number of fish) is usually relatively small in a coral tank compared to the number you COULD keep.
Your tank is quite small for an "aggressive" tank. What sort of aggressive fish do you want?
Corals also need quite a bit of lighting relative to what you would use on a aggressive tank...something to consider.
In the end, you tend not to have a tank that is particularly good on either side. I would suggest y ou do a lot of reading and research and budgeting to see what you can really keep and what you really want. But both tends not to work unless it is really done carefully...and even then it is probably short term.