1440 x 1080 is the same size as 1920 x 1080 (mostly). What I'm saying is, it will end up 1920 x 1080 when all is said and done. If you really need to change it go up to Edit, Project Properties, and choose something like XDCAM EX 1080i60 for the preset. Hope this helps and best of luck.
Uncompressed HD video transferred via an HD-SDI signal has pixel dimensions of either 1280 x 720 or 1920 x 1080. However, HD video recorded on tape is often horizontally compressed to reduce the data rate. DVCPRO HD, HDV, and HDCAM are three examples of formats whose native horizontal dimensions are squeezed. For example, 1080i60 DVCPRO HD is 1280 x 1080. 1080i50 DVCPRO HD is 1440 x 1080. We shoot some stuff on the Panasonic 200 and it comes in at 1080i60 DVCPRO HD is 1280 x 1080. FCP know how to interrupt it. What I'm saying is 1440 x 1080 is often marketed as 1920 x 1080.
If you want the best settings because of the discrepancy in dimensions even within a single format, it’s usually best to create HD graphics at either 1920 x 1080 or 1280 x 720, depending on your final output format.