575 Cumberland Street doesn’t exist anymore, it was demolished in the 1970s when Castle and Cumberland Streets were deviated to their current course. Below you can see photos of a couple of hand drawn maps. The first, a detail, shows 575 Cumberland highlighted in green. Compare the larger hand drawn map (note the green on this larger map is NOT 575!) with the image from the DCC Webmap. You should be able to see the site of 575 Cumberland Street two sections south of 58 Albany Street.
Many thanks to the DCC Archives for providing these images.