Driving three large 7.5v common anode 7-segment displays with Arduino
No, the 7660 is of no use. It can only supply enough current for a couple of segments, let alone displays.

The easiest (not necessarily the cheapest) way to get enough voltage for this display is to use a DC-DC converter, such as a TDK CC3-0512SF-E: 



This one will output 12V at up to 250mA, so for a 3-digit display 10mA/segment is okay. 

You will also need one resistor per segment of about 470 ohms, three ULN2003A darlington arrays. 

If you have 9-12V available somewhere else, you won't need the DC-DC converter, but you will still need the resistors and the ULN2003As.