agree that it OP jag looks female due to light spotting in the lower half of the body. But, young cichlids tend to adopt female like coloration to look sub dominant. Try to fill up its belly a lot, sometimes a male will slightly drop its genitalia.
If you are really looking for a male, there's no harm in letting it grow out to 10" before finding a female. Female cichlids tend to go for larger and more robust males.