SX740 is an EOS cam, we have early Magic Lantern code working on it. I haven't tested it personally, it probably includes ML GUI, given the available stubs. There will be no real features at this stage. And most Digic 8 cams have a currently not understood intermittent crash bug.
I think this means there'll never be CHDK for SX740? But perhaps, eventually, Magic Lantern.