If you are referring to FAA regs, then 3000 ft in class G or E airspace is VFR or uncontrolled if above VFR minimums until 17,999 feet.
If you are referring to the VFR cruise altitudes above 3000 feet then the aircraft must be flown 0-179 ODD+500 180-359 EVEN+500. It can be defined as VFR cursing altitudes which are recommended when above 3000.
Therefore you can fly at 3000 feet which doesn't require the rule, but watch out more carefully because you might not be the only one trying the same thing you are doing.
VFR Cruising Altitudes and Flight Levels
If your magnetic course
(ground track) is:
And you are more than 3,000 feet above the surface but below 18,000 feet MSL, fly:
And you are above 18,000 feet MSL to FL 290, fly:
0° to 179°
Odd thousands MSL, plus 500 feet
(3,500; 5,500; 7,500, etc.)
Odd Flight Levels plus 500 feet
(FL 195; FL 215; FL 235, etc.)
180° to 359°
Even thousands MSL, plus 500 feet
(4,500; 6,500; 8,500, etc.)
Even Flight Levels plus 500 feet
(FL 185; FL 205; FL 225, etc.)